Smoke and gas consuming furnace



(No Model.) I 2 Sheets-Sheet 1.

P; KILROY & J. A. FLICK.

SMOKE AND GAS GONSUMING- FURNACE- Patented June 6, 1882.

UNIT -1) STATE s PATENT OFFIC PETER KILROY AND JULIUS A. FLICK,OF,BOSTON, MASSACHUSETTS.

SMOKE AND GAS CONSUMING FURNACE.

SPECIFICATION forming part of Letters Patent No. 259,169, dated June 6,1882,

' 7 Application filed December 23, 1881. (No model.)

To all whom it may concern:

1% it. known that we, PETER KILR Y and ing Furnaces, of which thefollowing is a full, clear, and exact description, reference being hadto the accompanying drawings, making part of this specification, inwhich-- Figure 1 is a perspective view of a steamboiler and its furnacehaving our improvements applied thereto, a portion of one of the sidewalls of thefurnace being broken away to show'the interior thereof. Fig.2-is a longitudinal vertical section through the same on the line a a:of Fig. 3. Fig. 3 is a transverse section on theline'y y of Fig. 2.Fig.4 is a horizontal section on the line a z of Fig. 2.

Our invention relates to certain improvements on the smoke and gasconsuming furnace for which Letters Patent of the United States-weregranted to us on the 21st December,1880. In the furnace described in thesaid patent a series of air-superheatin g pipes wereemployed,communicatingwiththeatmospheric air and extending crosswisewithin thefurn ace directly over the fire, and then backward in the rearthereof, and provided with transverse is nevertheless open to theobjection that those portions of the pipes in which the air issuperheated, being located direotly over the fire, are,

, liable to be soon destroyed bythe intense heat sition for repairs,instead of embedding them to which they are subjected; and our presentinvention has for .its object to overcome this difficulty and at thesame time retain all the advantages due to locating the air-pipes withinthe furnace in a convenient and accessible poin the brick-work orsetting of the furnace, as heretofore, thus enabling us to apply ourimprovements to a furnace without any alteration of or tearing down ofthe brick-work, which was one of the great advantages of theconstruction described in our aforesaid patent -of 1880. and State ofMassachusetts, have invented cer- ,tain Improvements in Smoke and GasConsum- To this end our present invention consists in the combination,with the furnace, of air-superheating pipes communicating with theatmospheric air, and arranged in a serpentine form on each side of thefurnace in close proximity with the walls thereof, the air-pipes alsoextending backward in the rear of the fire,and being provided withtransverse portions having perforations, through which the air, afterbeing superheated in those portions of the pipes located-on each side ofthe fire, is emitted in fine jets or streams, which impinge upon andbecome thoroughly commingled with the smoke and gaseous products ofcombustion as they pass over the flame-bed, whereby their perfectignition and consumption'are insured. 70

Our invention also consists in the combination, with the transverseperforated pipe through which the superheated air is discharged, of aguard which projects rearwardly thereover in such a manner as to protectit in a great measure from the dust and cinders and prevent itsapertures from 'becomin g I clogged thereby; and, also, in thecombination, with the said perforated pipe, of a pit orchamber locatedimmediately in the rear thereof for the reception of the dust andcinders, which are thereby effectually prevented from being depositedagainst the pipe and covering up or obstructing its apertures, as mightotherwise occur. i

In the said drawings, A represents the furnaee; B, the boiler; a, thegrate-bars; b, the ash-pit O, the flame-bed, and D thecombustion-chamber.

Within the furnace A, on each side thereof, and in close proximitywiththe inner side, 0, of the walls, are arranged a pair ofsuperheating-pipes, E E, which areeach bent in a serpentine form, asseen in Figs. 1 and 2, in order that those portions exposed to theaction of the heat may be of the greatest possible length for thepurpose of increasing their air heating capacity. These pipes, which maybe composed of iron or other suitable material be'st adapted to resistthe action of head-rest I00 upon projecting ledges or shoulders d,forming a portion of the walls of the furnace, each ledge having agroove or recess, 0, for the reception of the lower portions, 10, of thebends of the pipes, which are thus steadied and held firmly in place.Each of the pipes E enters a chamber, f, formed in the furnace-wall;which is open in front to allow of the inward flow of the atmosphericair, which then passes into the bent portions of the pipes E within thefurnace, where it becomes thoroughly superheated by contact therewith,after which it passes through the longitudinal portions 12 of thesepipes, which extend backward to the rear of the furnace, and thence intothe transverse portions g, which extend across the flame-bed G in closeproximity therewith. The ends it of the pipes are closed, and thetransverse portions 9 are provided on their upper sides with a series ofperforations or discharge-orifices, 6, through which the highly-heatedair is emitted in fine streams or jets, which impinge upon and becomethoroughly commingled with the smoke and volatile gases as they flowover from the furnace A into the combustion-chamber D, whereby theirinstantaneous ignition and combustion are produced, causing them to bealmost entirely consumed within the combustion-chamber, thusintensifying the heat and effecting a great saving in the consumption offuel. By thus arranging the superheating-pipes E E along the inner sidesof the furnaee-walls, instead of directly over the fire, they areprevented from becoming unduly heated and quickly destroyed, which is animportant consideration, as it avoids the frequent removal and replacingof these pipes, while by placing them within the furnace, instead ofembedding them within the furnace-walls, they can be easily andeconomically applied to new or old furnaces, conveniently reached forrepairs, and will cause the air passing through them to be rapidly andintensely heated, as required, thus retaining all of the advantagesincident to the construction described in our aforesaid Letters Patentof 1880, and at the same time avoiding its defects. Furthermore, theintense heat generated is all retained and utilized, and may be broughtto bear at any desired point or points by varying the positions of theperforated portions g of the pipes, while all of the smoke, noxiousgases, and sparks are consumed, thus obviating the necessity of buildingchimneys of great height to carry off these products of combustion. Theportions g of the pipes E may, if desired, be provided with a series ofdischarge-nipples instead of the perforations i.

G G are guards composed of fire-brick or other suitable heat-resistingmaterial, which project rearward] y at an angle over the transverseperforated portions 9 of the pipes E, as seen in Figs. 1 and 2, andserve to protect them from the dust and cinders and prevent theirair-apertures i from becoming clogged thereby; and in order to preventthe dust and cinders from being deposited against the exposed sides ofthese transverse portions g of the pipes and accumulating to suchadegree as to cover them up, and thus obstruct their air-apertures t,the flame-bed O is provided immediately in the rear of each portion 9 ofthe pipes with a pit, H, which extends transversely across it, parallelwith the portion 9 of the pipe, a receptacle or chamber being thusformed, in which the dust and cinders are collected and by which theyare caused to drop below the level of the pipe, leaving itsair-apertures iperfectly free and unobstructed. When the pits orchambers H become filled their contents are removed through suitabledoors or openings, k, in the side of the brick-work, provided for thepurpose.

Our improvements can be easily and cheaply applied tofurnacesforstationaryboilers,steamboats, and locomotives, and also to ranges,stoves, fire-places, 850., or wherever a fire is required, without anyalteration or tearing away of the original parts or setting of thefurnace, stove, or fire-place, thus rendering our invention especiallyapplicable to furnaces, &c., already in use.

In addition to the above advantages, a furnace having our improvementsapplied thereto is capable of burning with the best results tan, 9 5sawdust, green wood, wet peat or hops, and screenings of all kindswithout the employment of a blower.

We are aware that there is a variety of constructions of furnaceswherein heated air is conducted by pipes through the furnace to thecombustion-chamber. Hence we make no broad claim to such invention, butconfine ourselves to the construction and arrangement herein shown anddescribed. to 5 What we claim as our invention, and desire to secure byLetters Patent, is-

1. The combination, with the furnace A and combustion-chamberD, oftheair-heatin g pipes E E, communicating with the atmospheric air no andarranged in a serpentine form within the furnace, and arranged on eachside only thereof and in close proximity with its walls, and thenextending backward in the rear thereof, and provided with transverseportions g, extending I r 5 across the flame-bed O, and having outletsor discharge-orifices 5, through which the highlyheated air is emittedin jets or fine streams, so as to impinge upon and commingle with thesmoke and gaseous products of combustion within the chamber 1), allconstructed and arranged to operate substantially in the manner and forthe purpose set forth.

2. In a smoke and gas consuming furnace, the combination, with theremovable air-superr 2 5 heating pipes E E, arranged as described, ofthe ledges d, projecting from the inner walls of the furnace A, andprovided with grooves or recesses e for receiving and supporting thebends of the pipes E, substantially as set forth.

3. In a smoke and gas consuming furnace, the combination ,with thetransverse perforated portions g of the pipes E, through which theWitness our hands this 17th day of Decem- 1o superheated air isdischarged into the comher, A. D. 1881.

bustion-chamber D, of the angular guards G, V

projecting rearwardly over the portions 9 of PETER KILROY. 7

the pipes for the purpose of protecting them JULIUS A. FLIOK.

from the dust and cinders, and thereby preventing their air-apertnres ifrom becoming In presence of- .clogged or obstructed, substantially asde- P. E. TESGHEMAOHER,

seribed. W. J. CAMBRIDGE.

